/*
 * Copyright 2021 TiKV Project Authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.webank.tikv.util;

public class KeyUtils {

    private static final char[] hexDigits =
        {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};

    public static String bytesToHex(byte[] bytes) {
        if (bytes == null) {
            return "";
        }
        int len = bytes.length;
        char[] out = new char[len << 1];
        for (int i = 0, j = 0; i < len; i++) {
            out[j++] = hexDigits[(0xF0 & bytes[i]) >>> 4];
            out[j++] = hexDigits[0x0F & bytes[i]];
        }
        return new String(out);
    }

}
